Science and Technology. Ping, a pulse of sound in active sonar. Pinging, the noise indicative of improper combustion in internal combustion engines. Ping (Chinese: åª), a Taiwanese measure of area. Ping project, a project of the European Molecular Biology network (EMBnet)
Pre-Market Stock Trading. As its name suggests, pre-market stock trading occurs before the stock market opens up for its regular hours of trading at 9:30 a.m ET. Pre-market stock trading takes place between the hours of 8:00 to 9:30 a.m. ET.
A presale estimate is the price range within or around which an auction house believes a work of art will sell for. The reserve price is the minimum dollar amount that either the auction house or the consignor is willing to sell the art for. If the high bid is lower than the reserve price, the art will not sell.